Battery off weight template (almost 600g) and in size (a triple 4s Battery 14.8V) for reduced low weight models. I was looking for a battery that offered autonomy with its 5000 mAh, I found myself with a battery that nailed my plane on the ground. Also this battery has its HXT connector in reverse polarity of the other batteries that can be found in specialty stores. So I returned because not suitable for my need